I got this great recipe from Dr. Mercola's Nutritional Typing Meal Plan. This can be used in place of gluten flour in most recipes.
Combine:
1 1/2 cups coconut flour
1 cup of rice flour
1 cup of potato starch flour
1/2 cup cornstarch
1/2 cup garbanzo flour or fava flour
2 TBS xanthan gum